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    Apparatus for recording and reproducing digital information signals of different transmission rates
    1.
    发明授权
    Apparatus for recording and reproducing digital information signals of different transmission rates 失效
    用于记录和再现不同传输速率的数字信息信号的装置

    公开(公告)号：US06441979B1

    公开(公告)日：2002-08-27

    申请号：US08405288

    申请日：1995-03-16

    申请人： Nobutaka Amada ,  Takaharu Noguchi ,  Takao Arai

    发明人： Nobutaka Amada ,  Takaharu Noguchi ,  Takao Arai

    IPC分类号： G11B509

    CPC分类号： G11B20/00007 ,  G11B15/125 ,  G11B15/1875 ,  G11B15/4673 ,  G11B20/10527 ,  G11B20/1866 ,  G11B27/3027 ,  G11B2020/10592 ,  G11B2220/90 ,  H04N5/78263 ,  H04N5/9201 ,  H04N5/9261 ,  H04N5/93

    摘要： In a digital information recording and reproducing apparatus of a rotary magnetic head type for selecting and recording a plurality of digital information signals having different transmission rates and for selectively reproducing the recorded signal, a high-rate digital information signal and a low-rate digital information signal are inputted for selection of either one thereof to be converted by a recording-system encoder into two channels of recording signals. When recording the high-rate signal, the rotary drum is turned at a rotation speed and the magnetic tape is fed at a feed speed (V1) to conduct 4-track azimuth recording of the signals for each rotation of the rotary drum by the first to fourth magnetic heads. To record the low-rate signal, the rotary drum is turned at a rotation speed substantially equal to the first rotation speed and the magnetic tape is fed at a feed speed almost equal to (V1/N) so as to achieve 4-track azimuth recording of record signals compressed on a time axis to 1/N of the original signals for every N rotations of the rotary drum by the magnetic heads. A reproducing system receives two channels of signals reproduced by the first to fourth magnetic heads and conducts for the signals such processes reverse to those of the encoding process of the recording system.

    摘要翻译： 在用于选择和记录具有不同传输速率的多个数字信息信号并用于选择性地再现记录信号的旋转磁头类型的数字信息记录和再现装置中，高速数字信息信号和低速数字信息 输入信号以选择要由记录系统编码器转换成两个通道的记录信号。 当记录高速率信号时，旋转磁鼓以转速转动，磁带以进给速度（V1）进给，以便通过第一个旋转磁鼓对旋转磁鼓的每次旋转的信号进行四磁道方位记录 到第四磁头。 为了记录低速率信号，旋转磁鼓以基本上等于第一转速的转速转动，并且磁带以几乎等于（V1 / N）的馈送速度馈送，以便实现4磁道方位角 通过磁头对旋转磁鼓的每N次旋转记录在时间轴上压缩的记录信号为原始信号的1 / N。 再现系统接收由第一至第四磁头再现的两个信道信道，并对与记录系统的编码处理相反的处理进行传送。